package com.test;
import android.app.Activity;
import android.graphics.Bitmap;
import android.graphics.Canvas;
import android.graphics.Bitmap.Config;
import android.os.Bundle;
import android.view.View;
import android.widget.Button;
import android.widget.ImageView;
import android.widget.ImageView.ScaleType;
public class ScreenPrinter extends Activity {
 /** Called when the activity is first created. */
 boolean customTitleSupported;
 public void onCreate(Bundle savedInstanceState) {
 super.onCreate(savedInstanceState);
 setContentView(R.layout.screen_printer);
 Button btn = (Button)findViewById(R.id.btn);
 btn.setOnClickListener(new Button.OnClickListener(){
  public void onClick(View arg0) {
  ImageView im = (ImageView)findViewById(R.id.img);
  Bitmap bmp = Bitmap.createBitmap(320, 480, Config.ARGB_8888);
  View cv = getWindow().getDecorView();
  cv.draw(new Canvas(bmp));
  im.setScaleType(ScaleType.FIT_XY);
  im.setImageBitmap(bmp);
  }});
 }
}

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
 android:layout_width="fill_parent" android:layout_height="fill_parent"
 android:orientation="vertical"
 android:background="@drawable/border">
 <Button android:layout_width="fill_parent"
 android:layout_height="wrap_content" android:id="@+id/btn"
 android:text="截屏"/>
 <LinearLayout android:layout_width="fill_parent"
 android:layout_height="fill_parent"
 android:layout_weight="1" android:padding="10dip"
 android:background="#ffffdd">
 <ImageView android:id="@+id/img"
 android:layout_width="fill_parent" android:layout_height="fill_parent"/>
 </LinearLayout>
</LinearLayout>